Whilst texting, press and hold the button to the left of the home button on the bottom of the phone. Select insert smiley and away you go.
Or download the Kii keyboard which has emoji emoticons built in. This can be fun but only if the message recipient has the same thing, otherwise they won't see the emoticons.

Welcome to the forum SylviaCaras! There are a couple of options to choose from. Download a third party message app or keyboard. (Or both) the keyboard with the best emoticon pack goes to SwiftKey...and the best messaging app for emoticons goes to GoSMS. Both free in the Play Store. Of course there are others to choose from and hopefully some of our other members can give you their preferences.
Good luck! :thumbup: